Iran “has helped a lot in transferring knowledge and expertise on one side, and transporting the rockets on another, helping Hamas depend on its local capabilities to produce such advanced technology.”Ali Hashem, “Hamas representative in Iran: latest round of fighting is strategic shift for group,” Al-Monitor, May 17, 2021, https://www.al-monitor.com/originals/2021/05/hamas-representative-iran-latest-round-fighting-strategic-shift-group.